Adjustable tool.



M. MILLER;

ADJUSTABLE TOOL. APPLICATION FILED MAY w, 1913.

1 103 808 Patented July 14,1911

FIG' 1 FIG 9' INVENTOI? UNITED STATES PATENT OFFICE.

MELCHIOR MILLER, OF LE MARS, IOWA. 1

ADJUSTABLE TOOL.

Specification of Letters Patent.

Patented July 14:, 1914.

Application filed May 19, 1913. Serial No. 768,682.

State of Iowa, have invented certain newand useful Improvements in Adjustable Tools, of which the followin is a specification, reference being had to the accompanying drawings, forming a part of this specification.

The object of my invention is toimprove the construction and operation of that class of tools as used in grinding valves and valve seats, to the end that a tool may be provided that can be readily adjusted to fit into the key sockets of any ordinary valve.

Vith these and other objects in view the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and finally ointed out in the appended claims, it be ing further understood that changes in the specific structure shown and described may be made within the scope of the claims without departing from the spirit of the invention.

In the accompanying drawings forming a part of this specification, and in which like Fig. 1.

1 the numerals of reference indicate similar parts in the several views: Figure 1 shows an ele vational view of an adjustable tool embodying my invention. Fig. 2 is an edge view of .The valves as well as the valve seats as used in explosive engines, in course of time become coated with a deposit commonly called soot, so that the valve will not accurately fit upon the seat. In order to remove dfeposit,'it is simply necessary to cover theebearingfisurface of the valve with a sui abrasive material such. as emery, and

'Irotate 'the' -v'alve in order to grind oil "the soot and insure a close fit of the Valves, and especially gasolene engines are convention'al ly provided With two sockets lQa catedfuj-pon opposite sides of the center of the valvefthese sockets being arranged to receive the key bosses of a suitable tool to the tang of which is secured a suitable rotating member as a brace. The size of the valve determines the size of the lug sockets, as well as the distance these sockets are from the center of the valve, and in grind ing the valves of an ordinary engine, usually valve andiwse'at. those employs. in

- three separate valve-engaging tools are nee- "essary."

In my present invention however, I rov1de a valve tool including two mem ers which are secured in adjusted relation, so

that the tool can be used in engaging the boss sockets of a small valve, as well as those of a large valve, in the operation of grinding the valve.

In carrying out the aim of my invention, I provide a tang 1, which has its chuckengaging end 2,tapered and squared, so that the end 2, will securely fit wlthin a chuck or square tool socket. Intermediate of its ends the tang 1 is provided with the enlargement 3, While the remaining end is in the form of an enlarged fiat head 4:, from the end and near one corner of which ex tends a key boss 5, which is preferably cylindrical.

Laterally extending from the enlargement 3, 1s the ,pivot lug 6, which is arranged for co-action with the eye 7, which is pivotally held upon the pivot lug. This eye 7 forms a part of the stub tang 8, which has the enlarged flat head 9, rovided with the transversely extending s 0t 10 and from the end and one corner of which extends the key boss 13, the key bosses 5 and 13 extending in parallel spaced relation.

The head 4 is provided with two threaded screw openings arranged to receive a set screw 12, which passes through the slot 10, and the head of which is adapted to bind upon the head 9, to securely hold the two enlarged fiat heads 4 and 9 in adjustable relation. y

In the use of the tool, the screw ,12 is loosened and'the fixed key boss 5 is inserted in one of. the boss openings within the valve to be ground, while the other and adjustable key boss 13 is arranged to fit into the opposite boss socket within the valve. The key bosses 5 and 13 having been properly adjusted, the screw 12 is tightened to connect the heads 4 and 9. The tool can then. be rotated in the. operation of grinding the valve. Then a large or small valve is to be ground, it is simply necessary to loosen the screw 12 and readjust the key bosses 5 and 13,

The tool is simple and inexpensive in construction, and both durable and eificient in operation, and the adjustment of the stub tang can be efiected with ease, accuracy and despatch. i

Having thus described my said invention U. S. Letters Patent is:

A tool of the character described comprising a tang having a flat enlarged head from one end of which extends a key boss and which has a laterally extending pivot lug intermediate of its ends a threaded Lopeni'ng being located Within the head, in combination with a stub tang at one end having an eye arranged to engage said lug and at the other end a flat enlarged slotted head arranged to slide over said first mentioned headwith a key lug extending from the end thereof said lugs extending in parallel l5 spaced relation and a set screw passing through said slot and threading into said threaded opening, all arranged as and in the manner set forth.

MELOHIOR MILLER.

Copies of this patent may be obtained for five cents each, lay-addressing the Ccmm'lssioner of E'atenta.

' Washington, D. (2. 

